An off-duty officer was involved in an early morning shooting Friday in lower Makiki, which sent a bar worker to the hospital with a stomach wound.

Police said the gun "accidentally discharged" in the bar.

Paramedics treated a 40-year-old woman at King's Sports Bar, formerly Debbie's Place, at 1283 S. King Street, for a gunshot wound at 1:50 a.m. and took her in serious condition to the hospital.

Deputy Police Chief Dave Kajihiro, at a news conference, said both criminal and internal investigations have been started against the 25-year-veteran officer, a sergeant who is assigned to the Chinatown district.

The officer faces a possible second-degree assault charge and anything from a written reprimand to expulsion from the police force, depending on the outcome of the Professional Standards Office investigation.

The officer was not arrested. His police powers have been restricted, Kajihiro said.

Kajihiro said investigators are trying to determine if the weapon fired belonged to the officer.

Kajihiro would not say if the officer was drinking with fellow officers or who made the emergency 911 call to report the incident.